[PATCH v2 1/2] hid: sony: Refactor the output report sending functions

[Frank Praznik <frank.praznik@gmail.com>]

Refactor the output report sending functions to allow for the sending of output
reports without enqueuing a work item.  Output reports for any device can now be
sent via the send_output_report function pointer in the sony_sc struct which
points to the appropriate output function.  The individual state worker
functions have been replaced with a universal sony_state_worker function which
uses this function pointer.

Signed-off-by: Frank Praznik <frank.praznik@gmail.com>
---

 v2: Use a function pointer for selecting the output report function
     instead of a series of if/else branches.

 drivers/hid/hid-sony.c | 32 +++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 661f94f..fb67839 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -1028,6 +1028,7 @@ struct sony_sc {
 	struct led_classdev *leds[MAX_LEDS];
 	unsigned long quirks;
 	struct work_struct state_worker;
+	void(*send_output_report)(struct sony_sc*);
 	struct power_supply *battery;
 	struct power_supply_desc battery_desc;
 	int device_id;
@@ -1782,7 +1783,7 @@ error_leds:
 	return ret;
 }
 
-static void sixaxis_state_worker(struct work_struct *work)
+static void sixaxis_send_output_report(struct sony_sc *sc)
 {
 	static const union sixaxis_output_report_01 default_report = {
 		.buf = {
@@ -1796,7 +1797,6 @@ static void sixaxis_state_worker(struct work_struct *work)
 			0x00, 0x00, 0x00, 0x00, 0x00
 		}
 	};
-	struct sony_sc *sc = container_of(work, struct sony_sc, state_worker);
 	struct sixaxis_output_report *report =
 		(struct sixaxis_output_report *)sc->output_report_dmabuf;
 	int n;
@@ -1839,9 +1839,8 @@ static void sixaxis_state_worker(struct work_struct *work)
 			HID_OUTPUT_REPORT, HID_REQ_SET_REPORT);
 }
 
-static void dualshock4_state_worker(struct work_struct *work)
+static void dualshock4_send_output_report(struct sony_sc *sc)
 {
-	struct sony_sc *sc = container_of(work, struct sony_sc, state_worker);
 	struct hid_device *hdev = sc->hdev;
 	__u8 *buf = sc->output_report_dmabuf;
 	int offset;
@@ -1886,9 +1885,8 @@ static void dualshock4_state_worker(struct work_struct *work)
 				HID_OUTPUT_REPORT, HID_REQ_SET_REPORT);
 }
 
-static void motion_state_worker(struct work_struct *work)
+static void motion_send_output_report(struct sony_sc *sc)
 {
-	struct sony_sc *sc = container_of(work, struct sony_sc, state_worker);
 	struct hid_device *hdev = sc->hdev;
 	struct motion_output_report_02 *report =
 		(struct motion_output_report_02 *)sc->output_report_dmabuf;
@@ -1907,6 +1905,12 @@ static void motion_state_worker(struct work_struct *work)
 	hid_hw_output_report(hdev, (__u8 *)report, MOTION_REPORT_0x02_SIZE);
 }
 
+static void sony_state_worker(struct work_struct *work)
+{
+	struct sony_sc *sc = container_of(work, struct sony_sc, state_worker);
+	sc->send_output_report(sc);
+}
+
 static int sony_allocate_output_report(struct sony_sc *sc)
 {
 	if ((sc->quirks & SIXAXIS_CONTROLLER) ||
@@ -2234,11 +2238,13 @@ static void sony_release_device_id(struct sony_sc *sc)
 	}
 }
 
-static inline void sony_init_work(struct sony_sc *sc,
-					void (*worker)(struct work_struct *))
+static inline void sony_init_output_report(struct sony_sc *sc,
+				void(*send_output_report)(struct sony_sc*))
 {
+	sc->send_output_report = send_output_report;
+
 	if (!sc->worker_initialized)
-		INIT_WORK(&sc->state_worker, worker);
+		INIT_WORK(&sc->state_worker, sony_state_worker);
 
 	sc->worker_initialized = 1;
 }
@@ -2312,7 +2318,7 @@ static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id)
 		hdev->quirks |= HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP;
 		hdev->quirks |= HID_QUIRK_SKIP_OUTPUT_REPORT_ID;
 		ret = sixaxis_set_operational_usb(hdev);
-		sony_init_work(sc, sixaxis_state_worker);
+		sony_init_output_report(sc, sixaxis_send_output_report);
 	} else if ((sc->quirks & SIXAXIS_CONTROLLER_BT) ||
 			(sc->quirks & NAVIGATION_CONTROLLER_BT)) {
 		/*
@@ -2321,7 +2327,7 @@ static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id)
 		 */
 		hdev->quirks |= HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP;
 		ret = sixaxis_set_operational_bt(hdev);
-		sony_init_work(sc, sixaxis_state_worker);
+		sony_init_output_report(sc, sixaxis_send_output_report);
 	} else if (sc->quirks & DUALSHOCK4_CONTROLLER) {
 		if (sc->quirks & DUALSHOCK4_CONTROLLER_BT) {
 			/*
@@ -2336,9 +2342,9 @@ static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id)
 			}
 		}
 
-		sony_init_work(sc, dualshock4_state_worker);
+		sony_init_output_report(sc, dualshock4_send_output_report);
 	} else if (sc->quirks & MOTION_CONTROLLER) {
-		sony_init_work(sc, motion_state_worker);
+		sony_init_output_report(sc, motion_send_output_report);
 	} else {
 		ret = 0;
 	}
-- 
2.4.3